Friction pulley mechanism.



'ltliiii'rii *rimini Patti-urteil. .Tilly 4l, 19ml.

SPECIFICATION' forming part: of Letters Partant No. "793,992, dated July 4:, 1905.

Application tiled April 22, 1904. Serial Noi 20G-,EllA

lie it known thiit l, i\ii'i"iiiii: fit. (lowuu, fi citizen ol: the llniteil twitzites, resiilingi` :it lllloreester, in the eoiuity olE Woreester :intl teltiite ol? lvlnsszieliiisetts, lnive inventeil eer tziiii ne :inil usel'ul improvements in l `riotion llulley lvleehzinism, et' whieh the 'Followini;- is :i speeitiezitioii.

llly invention relzites to ny 'trietion-liiilley, unilmorepiiitieiilni'lyto the meelizuiismwhich nieves` :i pulley :intl :i plzite or ilisk oii :i shziflft inte unil ont oll lirietiemil ei'ilezigement with ezieh other.

'.lhe elije/et oit my ii'ivention is to inipreve upon the eonstrnetion ot l'rietion meehiinisni Vl'or Ifrietioii-pulleys nml other Vtrietion ileviees :is oriliniirily miiile :intl to proviile :i meehnnism otE simple eonstruetion mul operii tionwhiehwill positively `move:i'trietzion-piilley :uul :i tfrietieu plzite or ilisk into :intl out oli lfrietioniil engagement with eiioli other :nul net to loek them in engagement with eneli other.

.ililiy inventiini eens-ists in eertiiin nevel leiitures et eeiistriietioii el my improveniente, :is will he hereinnrl'ter ilully ileserilieil.

ll lnive shown in the ilrziwinlig's my improve ments in Ylrietion meehiinism eomhineil with n helt-pulley loose on n, shziflt iinil te he moveil into :intl ont el trietiemil engagement with :i phite taint on the Shiiftit :intl hiivinii' n, `freni' ii ttneheil thereto; hut the pulley muy he l'iist on the sl'inilt :intl the lrietion-pliite loose on the slni'lit, il' preferred, unil my imprevements mziy he useil with :my other trietion meehnnisiii, il ilesireil.

Yherliei'ring to the ilrnrwiiig's, Figure l is :in eilg'e view ot :i geur :intl Al'rietion pliiite :intl :i heit-pulley unil my improvements eomhineil tlieri-nvitli, showingl the pulley loeketl in en giigemeut with the lrii'ition-plnite. File'. il

eorrespomls te litigi'. l, hut shows the pulley ilisengzigeil Vlrom the lrietion-lrilnite.

lin the :ieeempziuying' ili'iiwines, l is :i retniry shii'litn 2 is :i` Alrietien pliiitie or (liskt, in this instziiiee lfiist ou the shiitt 1l, :incl hziviiig;l in this in- .stiinee :i ltreni' il :ittziehei'l to one siile thereel". 'lo the other sule o'lC the lfrii-tion-plnte :l is

preternhly :ittiieheil :i ring' 2, pre l'eriilily elE i yielilingi` iniiteriiil, :is lenther, to he engaged hy the inner eilge or rim el. the pulley -l-. ',lthe pulley -l, shown in thisl instzinee :is :i elt}.nil leya is in this iuritiinee loose on the slinlxt l.

l will now ileserihe my improvements iu lirietion meehginism t'or movingl the pulley Alon the shiil't l into :init ont ol| engagement with the platte. 3.

rllhe huh lr ol the 'pulley l hns :in extermil iin'nnliir reeess tliei'eiii to reeeive the ring` 5. 'lhe ringv 5 luis thereon oppesitely-extending projeetions 5, to whieh nre pi\'ot:illy :ittzieheil one enil olA two links t3. 'lhe ot hei' enil ol" the two links l :ire pivotiill'fy nttiieheil to niljilstzihle holts T in one nrni. ol t\\'e :ingle oi' hell--eriink levers il. ',lhe two nnii'le or helleriink levers` :ire pivotiilly zittiieheil to oppositely-exteniling projeetiens ll on :i eollzir E), liest en the slnittt l. rll`he other :irms H el' the two u,ii; 'le-levers ti :ire pivotzilly :itlnelieil to oppositelyextenilin;l :irms l2 en the eollnr l?l1 loosely mounteil on the .shnlt l mul hiivingl :in ziiiinnliir rei-ess l2 therein te reeeive the lorkeil or yoke-slinpe enil ol" the shipperlever. (Not shown.) fin zirin l() on the eollnr t) exteiuls iiile :i reeess in the rinii` 5 te lioli'l .siiiil ring in the reeess in the huh l et the pulley'l zinil :ilse to keep the ring in proper reliitive position willi the eollnr ti.

llhe operntion el'v my improvements in trie tion nieehnnisin will he reziilily iinilerstootl hy those skilleil in th*y nrt. thipposiiieI the pulley lto he ont el' enezigement with the plzite L, :is shown in Fie'. ik :inil the Yl'rietion meehniiism in the position shown, the eolhir l2 is moveil ou the shii lit l hy the shipperlevei (not shown) in the (tiret-,tien o'l :irrow u.. rl'he movement ol the eollzir l2 reeks the :inglwltfvers S, whieh :ire pivotiilly supported on nthe s'tiitiomiry eolliir i), in the ilireetion olI nrrows /1 :intl moves the links (3 towziril eneh ether` reusing the ring' 5, eiigziging the huh il ol' the pulley l5 to move the pulley sl on the shitlft ,l tewziril iiiiil into engagement; with the ring 2 on the Yfriction-plate 2. Then the links (3 and the arms ot the angle-levers S, to which they are pivotally attached, are in a, substantially straight line or on dead-centers, as shown in Fig. l, then the pulley .l will be locked in frietional engagement with the plate 2. lVhen the collar l2 is moved in the opposite direction, as indicated by arroiv c, the

pulley -lis moved out o'tf engagement n'ith the ring 2 on the it'riction-plate 2.

It will be understood that the details ot eonstruetion et my improvements may be varied. iit desired.

Having thus described my invention, what I elaim as nen', and desire. to seeure by Letters latent, isvs l. .ln a triction pulley mechanism, the Combination with a sha'lit, a tric-tien disk or platte, and a pulley, one oli said parts being tast, and the other loose on said sha lit, ol means tor positively moving` said Ytrietion disk or plate and said pulley, into and out ot trietional engagement, said means eon1pris ing a collar tast on said sha'tt, angle-levers pivotally attaehed to said collar, and having one arm thereotf pivotally attached 'to Vlinks, and said links pivotally attaehed to a ring connected with the hub olf said pulley, and the other arm of said anglclevers pivotally attaehed to a collar loose on said shaft, and said collar, adapted to have a sliding motion en said slia't't, substantially as shown and described.

2. ln a `Friction clutch mechanism, the eomhina tion with a, shaft, a YFriction disk or plate. and a pulley, one olf said parts being tast, aud the other loose on said shaClit, ol means for positively moving said 'trietiou disk or plate, and said pulley, into and out oit trietional engagement, said means comprising a collar:tastonsaid shat`t,andhavingoppositely extendingl projections thereon, and an arm on said eollar extending into a recess in a ring,

and said ring extending in a n annular recess in the hul oit said pulley, and having oppositely extending projeetions thereon, t'yvo linksl j'iivotally attached to said projeetions at one end, and pivotally connected with two angle or lj (o\llerank levers at their other end, and said anglelevers, pivotally mounted on said projections on said stationary collar. and pivotally attaehed to they opposite]yexten l ing arms on a eollar loosely mounted on said shaft, and said collar, having an annular recess therein adapted to reeeive the end ot a shipjwr-lever, substantially as shown and described. o

53. ln a ilriction eluteh meehanism. the combination yvith a shaft, a Ytrietion disk or plate, and a pulley, one ot said parts being tast, and the other loose on said sha'lit, olf means Ytor positively moving said friction disk or plate, and said pulley, into and out et 'l`rietional engagement, said means comprising a eollar'l'astonsaidshatt,andhavingoppositelyextending projections thereon, and an arm on said eollar extending into a recess in a ring, and said ring extending in an annular recess in the hub ot' said pulley, and havingl oppositely extending projections thereon, two links pivotally attaehed to said projections at one end, and each pivotally eonntafted at its opposite end to an adjustable bolt secured to one arm oit an angle or bell-crank lever, and tyvo angle or bell-crank levers pivotally mounted on said projections on said stationary collar, and pivotallyv attached to the oppositely-extending arms on a collar loosely mounted on said shatt, and said eollar, having an annular recess therein adapted to receive the end olet a shipper-lever, substantially as shown and described.

ARTHUR S. CVCVAVN.

ll'vitnesses .l'oHN C. DEWEY, MINNA Hmxs. 

